309700961 has 4 divisors (see below), whose sum is σ = 311322624. Its totient is φ = 308079300.

The previous prime is 309700939. The next prime is 309700981. The reversal of 309700961 is 169007903.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 169007903 = 71 ⋅2380393.

It is a cyclic number.

It is not a de Polignac number, because 309700961 - 2¹⁸ = 309438817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309700901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810545 + ... + 810926.

It is an arithmetic number, because the mean of its divisors is an integer number (77830656).

Almost surely, 2^309700961 is an apocalyptic number.

It is an amenable number.

309700961 is a deficient number, since it is larger than the sum of its proper divisors (1621663).

309700961 is a wasteful number, since it uses less digits than its factorization.

309700961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621662.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 309700961 is about 17598.3226757552. The cubic root of 309700961 is about 676.5722552105.

The spelling of 309700961 in words is "three hundred nine million, seven hundred thousand, nine hundred sixty-one".