31620963469 has 4 divisors (see below), whose sum is σ = 31622002560. Its totient is φ = 31619924380.

The previous prime is 31620963383. The next prime is 31620963499. The reversal of 31620963469 is 96436902613.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31620963469 is a prime.

It is a super-2 number, since 2×31620963469² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31620963499) 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, 472477 + ... + 535234.

It is an arithmetic number, because the mean of its divisors is an integer number (7905500640).

Almost surely, 2^31620963469 is an apocalyptic number.

It is an amenable number.

31620963469 is a deficient number, since it is larger than the sum of its proper divisors (1039091).

31620963469 is a wasteful number, since it uses less digits than its factorization.

31620963469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039090.

The product of its (nonzero) digits is 1259712, while the sum is 49.

The spelling of 31620963469 in words is "thirty-one billion, six hundred twenty million, nine hundred sixty-three thousand, four hundred sixty-nine".