100972397 has 2 divisors, whose sum is σ = 100972398. Its totient is φ = 100972396.

The previous prime is 100972387. The next prime is 100972409. The reversal of 100972397 is 793279001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94692361 + 6280036 = 9731^2 + 2506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100972397 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100972397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100972307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50486198 + 50486199.

It is an arithmetic number, because the mean of its divisors is an integer number (50486199).

Almost surely, 2^100972397 is an apocalyptic number.

It is an amenable number.

100972397 is a deficient number, since it is larger than the sum of its proper divisors (1).

100972397 is an equidigital number, since it uses as much as digits as its factorization.

100972397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 100972397 is about 10048.5022267003. The cubic root of 100972397 is about 465.6585220194.

The spelling of 100972397 in words is "one hundred million, nine hundred seventy-two thousand, three hundred ninety-seven".