151617749 has 4 divisors (see below), whose sum is σ = 155715564. Its totient is φ = 147519936.

The previous prime is 151617743. The next prime is 151617769. The reversal of 151617749 is 947716151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947716151 = 5507 ⋅172093.

It can be written as a sum of positive squares in 2 ways, for example, as 105472900 + 46144849 = 10270^2 + 6793^2 .

It is a cyclic number.

It is not a de Polignac number, because 151617749 - 2⁴ = 151617733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151617743) 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, 2048852 + ... + 2048925.

It is an arithmetic number, because the mean of its divisors is an integer number (38928891).

Almost surely, 2^151617749 is an apocalyptic number.

It is an amenable number.

151617749 is a deficient number, since it is larger than the sum of its proper divisors (4097815).

151617749 is an equidigital number, since it uses as much as digits as its factorization.

151617749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097814.

The product of its digits is 52920, while the sum is 41.

The square root of 151617749 is about 12313.3159222039. The cubic root of 151617749 is about 533.2325861349.

The spelling of 151617749 in words is "one hundred fifty-one million, six hundred seventeen thousand, seven hundred forty-nine".