31698773149 has 4 divisors (see below), whose sum is σ = 31747767264. Its totient is φ = 31649779036.

The previous prime is 31698773131. The next prime is 31698773173. The reversal of 31698773149 is 94137789613.

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 not a de Polignac number, because 31698773149 - 2¹³ = 31698764957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31698773093 and 31698773102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31698773179) 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, 24496087 + ... + 24497380.

It is an arithmetic number, because the mean of its divisors is an integer number (7936941816).

Almost surely, 2^31698773149 is an apocalyptic number.

It is an amenable number.

31698773149 is a deficient number, since it is larger than the sum of its proper divisors (48994115).

31698773149 is an equidigital number, since it uses as much as digits as its factorization.

31698773149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48994114.

The product of its digits is 6858432, while the sum is 58.

The spelling of 31698773149 in words is "thirty-one billion, six hundred ninety-eight million, seven hundred seventy-three thousand, one hundred forty-nine".