1634047157 has 4 divisors (see below), whose sum is σ = 1730167596. Its totient is φ = 1537926720.

The previous prime is 1634047109. The next prime is 1634047193. The reversal of 1634047157 is 7517404361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1120843441 + 513203716 = 33479^2 + 22654^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634047157 - 2⁸ = 1634046901 is a prime.

It is a super-2 number, since 2×1634047157² = 5340220222599565298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1634047157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634047057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48060194 + ... + 48060227.

It is an arithmetic number, because the mean of its divisors is an integer number (432541899).

Almost surely, 2^1634047157 is an apocalyptic number.

1634047157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1634047157 is a deficient number, since it is larger than the sum of its proper divisors (96120439).

1634047157 is an equidigital number, since it uses as much as digits as its factorization.

1634047157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96120438.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 1634047157 is about 40423.3491561498. The cubic root of 1634047157 is about 1177.8451425193.

The spelling of 1634047157 in words is "one billion, six hundred thirty-four million, forty-seven thousand, one hundred fifty-seven".