69402157 has 4 divisors (see below), whose sum is σ = 75711456. Its totient is φ = 63092860.

The previous prime is 69402139. The next prime is 69402161. The reversal of 69402157 is 75120496.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 69402157 - 2⁷ = 69402029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69412157) 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, 3154633 + ... + 3154654.

It is an arithmetic number, because the mean of its divisors is an integer number (18927864).

Almost surely, 2^69402157 is an apocalyptic number.

It is an amenable number.

69402157 is a deficient number, since it is larger than the sum of its proper divisors (6309299).

69402157 is a wasteful number, since it uses less digits than its factorization.

69402157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6309298.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 69402157 is about 8330.7957002918. The cubic root of 69402157 is about 410.9518969362.

The spelling of 69402157 in words is "sixty-nine million, four hundred two thousand, one hundred fifty-seven".