155604971 has 2 divisors, whose sum is σ = 155604972. Its totient is φ = 155604970.

The previous prime is 155604937. The next prime is 155604989. The reversal of 155604971 is 179406551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155604971 - 2⁶ = 155604907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155604931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77802485 + 77802486.

It is an arithmetic number, because the mean of its divisors is an integer number (77802486).

Almost surely, 2^155604971 is an apocalyptic number.

155604971 is a deficient number, since it is larger than the sum of its proper divisors (1).

155604971 is an equidigital number, since it uses as much as digits as its factorization.

155604971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 155604971 is about 12474.1721569008. The cubic root of 155604971 is about 537.8664914268.

The spelling of 155604971 in words is "one hundred fifty-five million, six hundred four thousand, nine hundred seventy-one".