153421657 has 2 divisors, whose sum is σ = 153421658. Its totient is φ = 153421656.

The previous prime is 153421643. The next prime is 153421663. The reversal of 153421657 is 756124351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153289161 + 132496 = 12381^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 153421657 - 2¹⁵ = 153388889 is a prime.

It is not a weakly prime, because it can be changed into another prime (153421157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76710828 + 76710829.

It is an arithmetic number, because the mean of its divisors is an integer number (76710829).

Almost surely, 2^153421657 is an apocalyptic number.

It is an amenable number.

153421657 is a deficient number, since it is larger than the sum of its proper divisors (1).

153421657 is an equidigital number, since it uses as much as digits as its factorization.

153421657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 153421657 is about 12386.3496236785. The cubic root of 153421657 is about 535.3390077787.

The spelling of 153421657 in words is "one hundred fifty-three million, four hundred twenty-one thousand, six hundred fifty-seven".