156349397 has 2 divisors, whose sum is σ = 156349398. Its totient is φ = 156349396.

The previous prime is 156349393. The next prime is 156349421. The reversal of 156349397 is 793943651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154604356 + 1745041 = 12434^2 + 1321^2 .

It is an emirp because it is prime and its reverse (793943651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156349397 - 2² = 156349393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156349393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78174698 + 78174699.

It is an arithmetic number, because the mean of its divisors is an integer number (78174699).

Almost surely, 2^156349397 is an apocalyptic number.

It is an amenable number.

156349397 is a deficient number, since it is larger than the sum of its proper divisors (1).

156349397 is an equidigital number, since it uses as much as digits as its factorization.

156349397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 47.

The square root of 156349397 is about 12503.9752478962. The cubic root of 156349397 is about 538.7228586159.

The spelling of 156349397 in words is "one hundred fifty-six million, three hundred forty-nine thousand, three hundred ninety-seven".