1972658707 has 4 divisors (see below), whose sum is σ = 2020772376. Its totient is φ = 1924545040.

The previous prime is 1972658693. The next prime is 1972658719. The reversal of 1972658707 is 7078562791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7078562791 = 69809 ⋅101399.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972658707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972658747) 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, 24056773 + ... + 24056854.

It is an arithmetic number, because the mean of its divisors is an integer number (505193094).

Almost surely, 2^1972658707 is an apocalyptic number.

1972658707 is a deficient number, since it is larger than the sum of its proper divisors (48113669).

1972658707 is an equidigital number, since it uses as much as digits as its factorization.

1972658707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48113668.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The square root of 1972658707 is about 44414.6226709177. The cubic root of 1972658707 is about 1254.1533751219.

The spelling of 1972658707 in words is "one billion, nine hundred seventy-two million, six hundred fifty-eight thousand, seven hundred seven".