70451690 has 16 divisors (see below), whose sum is σ = 127136520. Its totient is φ = 28108800.

The previous prime is 70451671. The next prime is 70451699. The reversal of 70451690 is 9615407.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 57441241 + 13010449 = 7579^2 + 3607^2 .

It is a super-2 number, since 2×70451690² = 9926881247712200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70451699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4775 + ... + 12794.

Almost surely, 2^70451690 is an apocalyptic number.

70451690 is a deficient number, since it is larger than the sum of its proper divisors (56684830).

70451690 is a wasteful number, since it uses less digits than its factorization.

70451690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17977.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 70451690 is about 8393.5505002353. The cubic root of 70451690 is about 413.0130793365.

The spelling of 70451690 in words is "seventy million, four hundred fifty-one thousand, six hundred ninety".