692021421 has 32 divisors (see below), whose sum is σ = 1261809920. Its totient is φ = 365020992.

The previous prime is 692021413. The next prime is 692021423. The reversal of 692021421 is 124120296.

It is not a de Polignac number, because 692021421 - 2³ = 692021413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (692021423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138370 + ... + 143283.

It is an arithmetic number, because the mean of its divisors is an integer number (39431560).

Almost surely, 2^692021421 is an apocalyptic number.

It is an amenable number.

692021421 is a deficient number, since it is larger than the sum of its proper divisors (569788499).

692021421 is a wasteful number, since it uses less digits than its factorization.

692021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281682 (or 281676 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 692021421 is about 26306.3000248990. The cubic root of 692021421 is about 884.5176688027.

The spelling of 692021421 in words is "six hundred ninety-two million, twenty-one thousand, four hundred twenty-one".