101572397 has 2 divisors, whose sum is σ = 101572398. Its totient is φ = 101572396.

The previous prime is 101572357. The next prime is 101572409. The reversal of 101572397 is 793275101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86471401 + 15100996 = 9299^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 101572397 - 2²⁰ = 100523821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101572357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50786198 + 50786199.

It is an arithmetic number, because the mean of its divisors is an integer number (50786199).

Almost surely, 2^101572397 is an apocalyptic number.

It is an amenable number.

101572397 is a deficient number, since it is larger than the sum of its proper divisors (1).

101572397 is an equidigital number, since it uses as much as digits as its factorization.

101572397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 101572397 is about 10078.3132021187. The cubic root of 101572397 is about 466.5790492537.

The spelling of 101572397 in words is "one hundred one million, five hundred seventy-two thousand, three hundred ninety-seven".