121637396 has 6 divisors (see below), whose sum is σ = 212865450. Its totient is φ = 60818696.

The previous prime is 121637359. The next prime is 121637401. The reversal of 121637396 is 693736121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 108576400 + 13060996 = 10420^2 + 3614^2 .

It is a super-2 number, since 2×121637396² = 29591312211321632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15204671 + ... + 15204678.

It is an arithmetic number, because the mean of its divisors is an integer number (35477575).

Almost surely, 2^121637396 is an apocalyptic number.

It is an amenable number.

121637396 is a deficient number, since it is larger than the sum of its proper divisors (91228054).

121637396 is a wasteful number, since it uses less digits than its factorization.

121637396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30409353 (or 30409351 counting only the distinct ones).

The product of its digits is 40824, while the sum is 38.

The square root of 121637396 is about 11028.9344906931. The cubic root of 121637396 is about 495.4757131346.

The spelling of 121637396 in words is "one hundred twenty-one million, six hundred thirty-seven thousand, three hundred ninety-six".