690061251 has 16 divisors (see below), whose sum is σ = 1006247808. Its totient is φ = 417168000.

The previous prime is 690061243. The next prime is 690061261. The reversal of 690061251 is 152160096.

It is not a de Polignac number, because 690061251 - 2³ = 690061243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690061261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12841 + ... + 39306.

It is an arithmetic number, because the mean of its divisors is an integer number (62890488).

Almost surely, 2^690061251 is an apocalyptic number.

690061251 is a deficient number, since it is larger than the sum of its proper divisors (316186557).

690061251 is a wasteful number, since it uses less digits than its factorization.

690061251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52562.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 690061251 is about 26269.0169401141. The cubic root of 690061251 is about 883.6817387076.

The spelling of 690061251 in words is "six hundred ninety million, sixty-one thousand, two hundred fifty-one".