70881957 has 12 divisors (see below), whose sum is σ = 102465324. Its totient is φ = 47217600.

The previous prime is 70881911. The next prime is 70881961. The reversal of 70881957 is 75918807.

It can be written as a sum of positive squares in 2 ways, for example, as 23561316 + 47320641 = 4854^2 + 6879^2 .

It is not a de Polignac number, because 70881957 - 2¹⁹ = 70357669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70881997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14023 + ... + 18395.

It is an arithmetic number, because the mean of its divisors is an integer number (8538777).

Almost surely, 2^70881957 is an apocalyptic number.

It is an amenable number.

70881957 is a deficient number, since it is larger than the sum of its proper divisors (31583367).

70881957 is a wasteful number, since it uses less digits than its factorization.

70881957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180 (or 6177 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 70881957 is about 8419.1422959824. The cubic root of 70881957 is about 413.8521666388.

It can be divided in two parts, 7088 and 1957, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 70881957 in words is "seventy million, eight hundred eighty-one thousand, nine hundred fifty-seven".