1078211957 has 2 divisors, whose sum is σ = 1078211958. Its totient is φ = 1078211956.

The previous prime is 1078211951. The next prime is 1078211969. The reversal of 1078211957 is 7591128701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 991368196 + 86843761 = 31486^2 + 9319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078211957 - 2²⁴ = 1061434741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078211951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539105978 + 539105979.

It is an arithmetic number, because the mean of its divisors is an integer number (539105979).

Almost surely, 2^1078211957 is an apocalyptic number.

It is an amenable number.

1078211957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078211957 is an equidigital number, since it uses as much as digits as its factorization.

1078211957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 41.

The square root of 1078211957 is about 32836.1379732757. The cubic root of 1078211957 is about 1025.4190495970.

The spelling of 1078211957 in words is "one billion, seventy-eight million, two hundred eleven thousand, nine hundred fifty-seven".