70501961 has 2 divisors, whose sum is σ = 70501962. Its totient is φ = 70501960.

The previous prime is 70501957. The next prime is 70501999. The reversal of 70501961 is 16910507.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63043600 + 7458361 = 7940^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 70501961 - 2² = 70501957 is a prime.

It is not a weakly prime, because it can be changed into another prime (70501931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35250980 + 35250981.

It is an arithmetic number, because the mean of its divisors is an integer number (35250981).

Almost surely, 2^70501961 is an apocalyptic number.

It is an amenable number.

70501961 is a deficient number, since it is larger than the sum of its proper divisors (1).

70501961 is an equidigital number, since it uses as much as digits as its factorization.

70501961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 70501961 is about 8396.5445869119. The cubic root of 70501961 is about 413.1112915254. Note that the first 3 decimals are identical.

The spelling of 70501961 in words is "seventy million, five hundred one thousand, nine hundred sixty-one".