956138249173 has 2 divisors, whose sum is σ = 956138249174. Its totient is φ = 956138249172.

The previous prime is 956138249149. The next prime is 956138249177. The reversal of 956138249173 is 371942831659.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888526808689 + 67611440484 = 942617^2 + 260022^2 .

It is a cyclic number.

It is not a de Polignac number, because 956138249173 - 2²⁹ = 955601378261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (956138249177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478069124586 + 478069124587.

It is an arithmetic number, because the mean of its divisors is an integer number (478069124587).

Almost surely, 2^956138249173 is an apocalyptic number.

It is an amenable number.

956138249173 is a deficient number, since it is larger than the sum of its proper divisors (1).

956138249173 is an equidigital number, since it uses as much as digits as its factorization.

956138249173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The spelling of 956138249173 in words is "nine hundred fifty-six billion, one hundred thirty-eight million, two hundred forty-nine thousand, one hundred seventy-three".