155972797 has 8 divisors (see below), whose sum is σ = 161747456. Its totient is φ = 150280272.

The previous prime is 155972783. The next prime is 155972801. The reversal of 155972797 is 797279551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155972797 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 (155972737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16653 + ... + 24274.

It is an arithmetic number, because the mean of its divisors is an integer number (20218432).

Almost surely, 2^155972797 is an apocalyptic number.

It is an amenable number.

155972797 is a deficient number, since it is larger than the sum of its proper divisors (5774659).

155972797 is a wasteful number, since it uses less digits than its factorization.

155972797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41067.

The product of its digits is 1389150, while the sum is 52.

The square root of 155972797 is about 12488.9069577766. The cubic root of 155972797 is about 538.2899688913.

The spelling of 155972797 in words is "one hundred fifty-five million, nine hundred seventy-two thousand, seven hundred ninety-seven".