39290771961 has 27 divisors (see below), whose sum is σ = 66026183301. Its totient is φ = 22449491064.

The previous prime is 39290771941. The next prime is 39290771981. The reversal of 39290771961 is 16917709293.

It is a happy number.

The square root of 39290771961 is 198219.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (39290771941) and next prime (39290771981).

It is not a de Polignac number, because 39290771961 - 2⁷ = 39290771833 is a prime.

It is a super-2 number, since 2×39290771961² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39290771898 and 39290771907.

It is not an unprimeable number, because it can be changed into a prime (39290771941) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4157880 + ... + 4167318.

Almost surely, 2^39290771961 is an apocalyptic number.

39290771961 is the 198219-th square number.

39290771961 is the 99110-th centered octagonal number.

It is an amenable number.

39290771961 is a deficient number, since it is larger than the sum of its proper divisors (26735411340).

39290771961 is an frugal number, since it uses more digits than its factorization.

39290771961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18898 (or 9449 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The spelling of 39290771961 in words is "thirty-nine billion, two hundred ninety million, seven hundred seventy-one thousand, nine hundred sixty-one".