69649057 has 2 divisors, whose sum is σ = 69649058. Its totient is φ = 69649056.

The previous prime is 69649043. The next prime is 69649061. The reversal of 69649057 is 75094696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44609041 + 25040016 = 6679^2 + 5004^2 .

It is a cyclic number.

It is not a de Polignac number, because 69649057 - 2²³ = 61260449 is a prime.

It is a super-2 number, since 2×69649057² = 9701982281978498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 69648998 and 69649016.

It is not a weakly prime, because it can be changed into another prime (69649067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34824528 + 34824529.

It is an arithmetic number, because the mean of its divisors is an integer number (34824529).

Almost surely, 2^69649057 is an apocalyptic number.

It is an amenable number.

69649057 is a deficient number, since it is larger than the sum of its proper divisors (1).

69649057 is an equidigital number, since it uses as much as digits as its factorization.

69649057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 69649057 is about 8345.6010568443. The cubic root of 69649057 is about 411.4386442490.

The spelling of 69649057 in words is "sixty-nine million, six hundred forty-nine thousand, fifty-seven".