152809691 has 4 divisors (see below), whose sum is σ = 152846232. Its totient is φ = 152773152.

The previous prime is 152809687. The next prime is 152809711. The reversal of 152809691 is 196908251.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 152809691 - 2² = 152809687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152809291) 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, 11045 + ... + 20678.

It is an arithmetic number, because the mean of its divisors is an integer number (38211558).

Almost surely, 2^152809691 is an apocalyptic number.

152809691 is a deficient number, since it is larger than the sum of its proper divisors (36541).

152809691 is an equidigital number, since it uses as much as digits as its factorization.

152809691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36540.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 152809691 is about 12361.6216978194. The cubic root of 152809691 is about 534.6262752281.

The spelling of 152809691 in words is "one hundred fifty-two million, eight hundred nine thousand, six hundred ninety-one".