70997761 has 2 divisors, whose sum is σ = 70997762. Its totient is φ = 70997760.

The previous prime is 70997743. The next prime is 70997767. The reversal of 70997761 is 16779907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58430736 + 12567025 = 7644^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 70997761 - 2²³ = 62609153 is a prime.

It is not a weakly prime, because it can be changed into another prime (70997767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35498880 + 35498881.

It is an arithmetic number, because the mean of its divisors is an integer number (35498881).

Almost surely, 2^70997761 is an apocalyptic number.

It is an amenable number.

70997761 is a deficient number, since it is larger than the sum of its proper divisors (1).

70997761 is an equidigital number, since it uses as much as digits as its factorization.

70997761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 70997761 is about 8426.0169119223. The cubic root of 70997761 is about 414.0774221778.

The spelling of 70997761 in words is "seventy million, nine hundred ninety-seven thousand, seven hundred sixty-one".