1690157327 has 4 divisors (see below), whose sum is σ = 1696259256. Its totient is φ = 1684055400.

The previous prime is 1690157321. The next prime is 1690157377. The reversal of 1690157327 is 7237510961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7237510961 = 11497 ⋅629513.

It is a cyclic number.

It is not a de Polignac number, because 1690157327 - 2⁴ = 1690157311 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 (1690157321) 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, 3050549 + ... + 3051102.

It is an arithmetic number, because the mean of its divisors is an integer number (424064814).

Almost surely, 2^1690157327 is an apocalyptic number.

1690157327 is a deficient number, since it is larger than the sum of its proper divisors (6101929).

1690157327 is an equidigital number, since it uses as much as digits as its factorization.

1690157327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101928.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 1690157327 is about 41111.5230440323. The cubic root of 1690157327 is about 1191.1753862261.

The spelling of 1690157327 in words is "one billion, six hundred ninety million, one hundred fifty-seven thousand, three hundred twenty-seven".